Improvement in burglar-alarms



J.. F. GILLILAND.

BURGLAR-ALARM.

No. 179,187. Patented :une 27,1876.

JAMES F. GILLILAND,

PATENT OF CINCINNATI, OHIO.

IMPROVEMENT IN BURGLARALARMS.

Specification forming part of Letters Patent No. l79,1S7, dated June 27, 1876; application filed May 13, i876.

To all 'whom it may concern:

Be it known that I, JAMES F. GILLILAND, of Cincinnati, Hamilton county, State ot' Ohio, have invented an Improvement in Burglar- Alarms, of which the following is a specification:

My invention has for its object the construction of a burglar-alarm that shall be capable of convenient stowage in the pocket of the owner when traveling; that shall be generally capable of attachment to any hinged door of any house, and that shall by the peculiar manner of its application foil the attempts of burglars to prevent its operation; and my invention has, further, for its object such a construction as that a class of cartridges, known as blank-paper cartridges,7 may be used toA chargethe alarm-one at a time, if a light report 1s desired, and an increased number, if

a heavy report is desired; and my inventionI consists in the first part, in connection with the case of the alarm, of a detachable screwconnected retaining-hook for securing the alarm in position, and that shall, by its detachability, admit of close'packing for pocket carrymg.

My invention consists in the second part, in

connection with the case having retaininghook, of a spring-cartridge, exploding-hamnier, and necessary trigger-projection.

- My invention consists in the third part, in connection with the burglar-alarm case, havingretaining-hook andspring-hammerto strike against an explosion-table, of a spring-striking plate for the retaining of the cartridges and for the hammer to strike against in eX- ploding the cartridges.

Figure l is a perspective lview of my improved burglar-alarn'i, as applied to'its use.

Fig. 2 is a Asectional View of the saine. Fig. 3 l

justable by said screw-connection to case A, so that it can be, when not in use, turned into line with the said case, and the Whole thereby caused to assume a more compact form for pocket occupancy 5 and it can be made to occupy, by convenient and easy temporary detachment of the hook, a still smaller space, and can be packed in a box of scarcely larger size than the size of the case A. Secured inside the `case A is a spring-hammer, C, so situated as that it will strike against the springshield D of the cartridge-exploding table E. The hammer C is of such length that it eX- tends through an aperture, a, in the case A, and its end is formed into a loop, c. In the opening a of case A is a trigger-projection, a', for the hammer to bear against when cocked. Figs. l and-3 represent the alarm when applied in position upon a door.

Previous to the application of the alarm, in position .upon the door, there is placed upon the table E. a iiat paper cartridge in such a manner as to be covered by the spring-striking plate D; or, if desired, more than one cartridge can be so placed at once, in which case the volume of the report would be increased.

In `operation, the alarm is then taken, and after the door F is opened wide enough, the hook B is projected into the' crack between the door and the jamb G, so that the prongb` shall point toward the jamb, after which the door is closed, thus forcing the prong b into the jamb, as seen in Fig. 3; and it has been ascertained by experiment that where the pressure is brought to bear, in forcing the prong b into the jamb, there will be a compression in the 'edge of the door, which will cause the alarm With its hook Ato take the position shown in Fig. 3. In this position it will be seen that the face of the alarm-case is not in a parallel plane to the door, but in an angular plane, whereby room is provided for the loop end c ot' hammer C to extend somewhat beyond the face of the case, when sprung back upon the trigger-rest a and after the hammer C is thus placed in position, preparatory to striking a blow, the door F, on being opened, will strike against the projecting end of hammer C, and trip it from its position,

thereby allowing it to discharge the cartridge on table E by striking` the spring-plate D, which communicates the blow to the cartridge.

It will be seen that Whatever marks may be made by the attachment of the alarm Will never be discernible to persons through casual glances, and thus these marks do not become an eyesore,77 from the fact that they Will be in the hinge-jamb and edge of the door; and it will also be seen that the position in which the alarm is placed is not approachable by a burglar to prevent the giving of the alarm, as is possible with the application of some alarms. The alarm is small and of convenient size and shape for the pocket, and the cartridges, being of flattened paper bits, can be carried in small and compact form.

Having thus described my invention, I claiml. In a burglar-alarm the case A, provided JAMES F. GILLILAND.

Witnesses:

J. L. WARTMANN, Jos. Il. BAKKER. 

